| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.server; |
| |
| import android.app.ActivityManagerNative; |
| import android.app.KeyguardManager; |
| import android.app.Notification; |
| import android.app.NotificationManager; |
| import android.app.PendingIntent; |
| import android.app.admin.DevicePolicyManager; |
| import android.app.backup.BackupManager; |
| import android.app.trust.IStrongAuthTracker; |
| import android.app.trust.TrustManager; |
| import android.content.BroadcastReceiver; |
| import android.content.ContentResolver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.content.pm.PackageManager; |
| import android.content.pm.UserInfo; |
| import android.content.res.Resources; |
| |
| import static android.Manifest.permission.ACCESS_KEYGUARD_SECURE_STORAGE; |
| import static android.content.Context.KEYGUARD_SERVICE; |
| import static android.content.Context.USER_SERVICE; |
| import static android.Manifest.permission.READ_CONTACTS; |
| import static com.android.internal.widget.LockPatternUtils.StrongAuthTracker.STRONG_AUTH_REQUIRED_AFTER_LOCKOUT; |
| |
| import android.database.sqlite.SQLiteDatabase; |
| import android.os.Binder; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.IBinder; |
| import android.os.IProgressListener; |
| import android.os.Parcel; |
| import android.os.Process; |
| import android.os.RemoteException; |
| import android.os.storage.IMountService; |
| import android.os.storage.StorageManager; |
| import android.os.ServiceManager; |
| import android.os.SystemProperties; |
| import android.os.UserHandle; |
| import android.os.UserManager; |
| import android.provider.Settings; |
| import android.provider.Settings.Secure; |
| import android.provider.Settings.SettingNotFoundException; |
| import android.security.KeyStore; |
| import android.security.keystore.AndroidKeyStoreProvider; |
| import android.security.keystore.KeyProperties; |
| import android.security.keystore.KeyProtection; |
| import android.service.gatekeeper.GateKeeperResponse; |
| import android.service.gatekeeper.IGateKeeperService; |
| import android.text.TextUtils; |
| import android.util.Log; |
| import android.util.Slog; |
| |
| import com.android.internal.util.ArrayUtils; |
| import com.android.internal.widget.ICheckCredentialProgressCallback; |
| import com.android.internal.widget.ILockSettings; |
| import com.android.internal.widget.LockPatternUtils; |
| import com.android.internal.widget.VerifyCredentialResponse; |
| import com.android.server.LockSettingsStorage.CredentialHash; |
| |
| import libcore.util.HexEncoding; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.nio.charset.StandardCharsets; |
| import java.security.InvalidAlgorithmParameterException; |
| import java.security.InvalidKeyException; |
| import java.security.KeyStoreException; |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| import java.security.SecureRandom; |
| import java.security.UnrecoverableKeyException; |
| import java.security.cert.CertificateException; |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| |
| import javax.crypto.BadPaddingException; |
| import javax.crypto.Cipher; |
| import javax.crypto.IllegalBlockSizeException; |
| import javax.crypto.KeyGenerator; |
| import javax.crypto.NoSuchPaddingException; |
| import javax.crypto.SecretKey; |
| import javax.crypto.spec.GCMParameterSpec; |
| |
| /** |
| * Keeps the lock pattern/password data and related settings for each user. |
| * Used by LockPatternUtils. Needs to be a service because Settings app also needs |
| * to be able to save lockscreen information for secondary users. |
| * @hide |
| */ |
| public class LockSettingsService extends ILockSettings.Stub { |
| private static final String TAG = "LockSettingsService"; |
| private static final String PERMISSION = ACCESS_KEYGUARD_SECURE_STORAGE; |
| private static final Intent ACTION_NULL; // hack to ensure notification shows the bouncer |
| private static final int FBE_ENCRYPTED_NOTIFICATION = 0; |
| private static final boolean DEBUG = false; |
| |
| private static final int PROFILE_KEY_IV_SIZE = 12; |
| private static final String SEPARATE_PROFILE_CHALLENGE_KEY = "lockscreen.profilechallenge"; |
| private final Object mSeparateChallengeLock = new Object(); |
| |
| private final Context mContext; |
| private final Handler mHandler; |
| private final LockSettingsStorage mStorage; |
| private final LockSettingsStrongAuth mStrongAuth; |
| private final SynchronizedStrongAuthTracker mStrongAuthTracker; |
| |
| private LockPatternUtils mLockPatternUtils; |
| private boolean mFirstCallToVold; |
| private IGateKeeperService mGateKeeperService; |
| private NotificationManager mNotificationManager; |
| private UserManager mUserManager; |
| |
| private final KeyStore mKeyStore = KeyStore.getInstance(); |
| |
| /** |
| * The UIDs that are used for system credential storage in keystore. |
| */ |
| private static final int[] SYSTEM_CREDENTIAL_UIDS = {Process.WIFI_UID, Process.VPN_UID, |
| Process.ROOT_UID, Process.SYSTEM_UID}; |
| |
| static { |
| // Just launch the home screen, which happens anyway |
| ACTION_NULL = new Intent(Intent.ACTION_MAIN); |
| ACTION_NULL.addCategory(Intent.CATEGORY_HOME); |
| } |
| |
| private interface CredentialUtil { |
| void setCredential(String credential, String savedCredential, int userId) |
| throws RemoteException; |
| byte[] toHash(String credential, int userId); |
| String adjustForKeystore(String credential); |
| } |
| |
| // This class manages life cycle events for encrypted users on File Based Encryption (FBE) |
| // devices. The most basic of these is to show/hide notifications about missing features until |
| // the user unlocks the account and credential-encrypted storage is available. |
| public static final class Lifecycle extends SystemService { |
| private LockSettingsService mLockSettingsService; |
| |
| public Lifecycle(Context context) { |
| super(context); |
| } |
| |
| @Override |
| public void onStart() { |
| AndroidKeyStoreProvider.install(); |
| mLockSettingsService = new LockSettingsService(getContext()); |
| publishBinderService("lock_settings", mLockSettingsService); |
| } |
| |
| @Override |
| public void onBootPhase(int phase) { |
| if (phase == SystemService.PHASE_ACTIVITY_MANAGER_READY) { |
| mLockSettingsService.maybeShowEncryptionNotifications(); |
| } else if (phase == SystemService.PHASE_BOOT_COMPLETED) { |
| // TODO |
| } |
| } |
| |
| @Override |
| public void onUnlockUser(int userHandle) { |
| mLockSettingsService.onUnlockUser(userHandle); |
| } |
| |
| @Override |
| public void onCleanupUser(int userHandle) { |
| mLockSettingsService.onCleanupUser(userHandle); |
| } |
| } |
| |
| private class SynchronizedStrongAuthTracker extends LockPatternUtils.StrongAuthTracker { |
| public SynchronizedStrongAuthTracker(Context context) { |
| super(context); |
| } |
| |
| @Override |
| protected void handleStrongAuthRequiredChanged(int strongAuthFlags, int userId) { |
| synchronized (this) { |
| super.handleStrongAuthRequiredChanged(strongAuthFlags, userId); |
| } |
| } |
| |
| @Override |
| public int getStrongAuthForUser(int userId) { |
| synchronized (this) { |
| return super.getStrongAuthForUser(userId); |
| } |
| } |
| |
| void register() { |
| mStrongAuth.registerStrongAuthTracker(this.mStub); |
| } |
| } |
| |
| /** |
| * Tie managed profile to primary profile if it is in unified mode and not tied before. |
| * |
| * @param managedUserId Managed profile user Id |
| * @param managedUserPassword Managed profile original password (when it has separated lock). |
| * NULL when it does not have a separated lock before. |
| */ |
| public void tieManagedProfileLockIfNecessary(int managedUserId, String managedUserPassword) { |
| if (DEBUG) Slog.v(TAG, "Check child profile lock for user: " + managedUserId); |
| // Only for managed profile |
| if (!UserManager.get(mContext).getUserInfo(managedUserId).isManagedProfile()) { |
| return; |
| } |
| // Do not tie managed profile when work challenge is enabled |
| if (mLockPatternUtils.isSeparateProfileChallengeEnabled(managedUserId)) { |
| return; |
| } |
| // Do not tie managed profile to parent when it's done already |
| if (mStorage.hasChildProfileLock(managedUserId)) { |
| return; |
| } |
| // Do not tie it to parent when parent does not have a screen lock |
| final int parentId = mUserManager.getProfileParent(managedUserId).id; |
| if (!mStorage.hasPassword(parentId) && !mStorage.hasPattern(parentId)) { |
| if (DEBUG) Slog.v(TAG, "Parent does not have a screen lock"); |
| return; |
| } |
| if (DEBUG) Slog.v(TAG, "Tie managed profile to parent now!"); |
| byte[] randomLockSeed = new byte[] {}; |
| try { |
| randomLockSeed = SecureRandom.getInstance("SHA1PRNG").generateSeed(40); |
| String newPassword = String.valueOf(HexEncoding.encode(randomLockSeed)); |
| setLockPasswordInternal(newPassword, managedUserPassword, managedUserId); |
| // We store a private credential for the managed user that's unlocked by the primary |
| // account holder's credential. As such, the user will never be prompted to enter this |
| // password directly, so we always store a password. |
| setLong(LockPatternUtils.PASSWORD_TYPE_KEY, |
| DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC, managedUserId); |
| tieProfileLockToParent(managedUserId, newPassword); |
| } catch (NoSuchAlgorithmException | RemoteException e) { |
| Slog.e(TAG, "Fail to tie managed profile", e); |
| // Nothing client can do to fix this issue, so we do not throw exception out |
| } |
| } |
| |
| public LockSettingsService(Context context) { |
| mContext = context; |
| mHandler = new Handler(); |
| mStrongAuth = new LockSettingsStrongAuth(context); |
| // Open the database |
| |
| mLockPatternUtils = new LockPatternUtils(context); |
| mFirstCallToVold = true; |
| |
| IntentFilter filter = new IntentFilter(); |
| filter.addAction(Intent.ACTION_USER_ADDED); |
| filter.addAction(Intent.ACTION_USER_STARTING); |
| filter.addAction(Intent.ACTION_USER_REMOVED); |
| mContext.registerReceiverAsUser(mBroadcastReceiver, UserHandle.ALL, filter, null, null); |
| |
| mStorage = new LockSettingsStorage(context, new LockSettingsStorage.Callback() { |
| @Override |
| public void initialize(SQLiteDatabase db) { |
| // Get the lockscreen default from a system property, if available |
| boolean lockScreenDisable = SystemProperties.getBoolean( |
| "ro.lockscreen.disable.default", false); |
| if (lockScreenDisable) { |
| mStorage.writeKeyValue(db, LockPatternUtils.DISABLE_LOCKSCREEN_KEY, "1", 0); |
| } |
| } |
| }); |
| mNotificationManager = (NotificationManager) |
| mContext.getSystemService(Context.NOTIFICATION_SERVICE); |
| mUserManager = (UserManager) mContext.getSystemService(Context.USER_SERVICE); |
| mStrongAuthTracker = new SynchronizedStrongAuthTracker(mContext); |
| mStrongAuthTracker.register(); |
| |
| } |
| |
| /** |
| * If the account is credential-encrypted, show notification requesting the user to unlock |
| * the device. |
| */ |
| private void maybeShowEncryptionNotifications() { |
| final List<UserInfo> users = mUserManager.getUsers(); |
| for (int i = 0; i < users.size(); i++) { |
| UserInfo user = users.get(i); |
| UserHandle userHandle = user.getUserHandle(); |
| final boolean isSecure = mStorage.hasPassword(user.id) || mStorage.hasPattern(user.id); |
| if (isSecure && !mUserManager.isUserUnlockingOrUnlocked(userHandle)) { |
| if (!user.isManagedProfile()) { |
| showEncryptionNotification(userHandle); |
| } else { |
| UserInfo parent = mUserManager.getProfileParent(user.id); |
| if (parent != null && |
| mUserManager.isUserUnlockingOrUnlocked(parent.getUserHandle()) && |
| !mUserManager.isQuietModeEnabled(userHandle)) { |
| // Only show notifications for managed profiles once their parent |
| // user is unlocked. |
| showEncryptionNotificationForProfile(userHandle); |
| } |
| } |
| } |
| } |
| } |
| |
| private void showEncryptionNotificationForProfile(UserHandle user) { |
| Resources r = mContext.getResources(); |
| CharSequence title = r.getText( |
| com.android.internal.R.string.user_encrypted_title); |
| CharSequence message = r.getText( |
| com.android.internal.R.string.profile_encrypted_message); |
| CharSequence detail = r.getText( |
| com.android.internal.R.string.profile_encrypted_detail); |
| |
| final KeyguardManager km = (KeyguardManager) mContext.getSystemService(KEYGUARD_SERVICE); |
| final Intent unlockIntent = km.createConfirmDeviceCredentialIntent(null, null, user.getIdentifier()); |
| if (unlockIntent == null) { |
| return; |
| } |
| unlockIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS); |
| PendingIntent intent = PendingIntent.getActivity(mContext, 0, unlockIntent, |
| PendingIntent.FLAG_UPDATE_CURRENT); |
| |
| showEncryptionNotification(user, title, message, detail, intent); |
| } |
| |
| private void showEncryptionNotification(UserHandle user) { |
| Resources r = mContext.getResources(); |
| CharSequence title = r.getText( |
| com.android.internal.R.string.user_encrypted_title); |
| CharSequence message = r.getText( |
| com.android.internal.R.string.user_encrypted_message); |
| CharSequence detail = r.getText( |
| com.android.internal.R.string.user_encrypted_detail); |
| |
| PendingIntent intent = PendingIntent.getActivity(mContext, 0, ACTION_NULL, |
| PendingIntent.FLAG_UPDATE_CURRENT); |
| |
| showEncryptionNotification(user, title, message, detail, intent); |
| } |
| |
| private void showEncryptionNotification(UserHandle user, CharSequence title, CharSequence message, |
| CharSequence detail, PendingIntent intent) { |
| if (DEBUG) Slog.v(TAG, "showing encryption notification, user: " + user.getIdentifier()); |
| |
| // Suppress all notifications on non-FBE devices for now |
| if (!StorageManager.isFileEncryptedNativeOrEmulated()) return; |
| |
| Notification notification = new Notification.Builder(mContext) |
| .setSmallIcon(com.android.internal.R.drawable.ic_user_secure) |
| .setWhen(0) |
| .setOngoing(true) |
| .setTicker(title) |
| .setDefaults(0) // please be quiet |
| .setPriority(Notification.PRIORITY_MAX) |
| .setColor(mContext.getColor( |
| com.android.internal.R.color.system_notification_accent_color)) |
| .setContentTitle(title) |
| .setContentText(message) |
| .setSubText(detail) |
| .setVisibility(Notification.VISIBILITY_PUBLIC) |
| .setContentIntent(intent) |
| .build(); |
| mNotificationManager.notifyAsUser(null, FBE_ENCRYPTED_NOTIFICATION, notification, user); |
| } |
| |
| public void hideEncryptionNotification(UserHandle userHandle) { |
| if (DEBUG) Slog.v(TAG, "hide encryption notification, user: "+ userHandle.getIdentifier()); |
| mNotificationManager.cancelAsUser(null, FBE_ENCRYPTED_NOTIFICATION, userHandle); |
| } |
| |
| public void onCleanupUser(int userId) { |
| hideEncryptionNotification(new UserHandle(userId)); |
| } |
| |
| public void onUnlockUser(final int userId) { |
| // Hide notification first, as tie managed profile lock takes time |
| hideEncryptionNotification(new UserHandle(userId)); |
| |
| if (mUserManager.getUserInfo(userId).isManagedProfile()) { |
| // As tieManagedProfileLockIfNecessary() may try to unlock user, we should not do it |
| // in onUnlockUser() synchronously, otherwise it may cause a deadlock |
| mHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| tieManagedProfileLockIfNecessary(userId, null); |
| } |
| }); |
| } |
| |
| // Now we have unlocked the parent user we should show notifications |
| // about any profiles that exist. |
| List<UserInfo> profiles = mUserManager.getProfiles(userId); |
| for (int i = 0; i < profiles.size(); i++) { |
| UserInfo profile = profiles.get(i); |
| final boolean isSecure = |
| mStorage.hasPassword(profile.id) || mStorage.hasPattern(profile.id); |
| if (isSecure && profile.isManagedProfile()) { |
| UserHandle userHandle = profile.getUserHandle(); |
| if (!mUserManager.isUserUnlockingOrUnlocked(userHandle) && |
| !mUserManager.isQuietModeEnabled(userHandle)) { |
| showEncryptionNotificationForProfile(userHandle); |
| } |
| } |
| } |
| } |
| |
| private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| if (Intent.ACTION_USER_ADDED.equals(intent.getAction())) { |
| // Notify keystore that a new user was added. |
| final int userHandle = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0); |
| if (userHandle > UserHandle.USER_SYSTEM) { |
| removeUser(userHandle, /* unknownUser= */ true); |
| } |
| final KeyStore ks = KeyStore.getInstance(); |
| final UserInfo parentInfo = mUserManager.getProfileParent(userHandle); |
| final int parentHandle = parentInfo != null ? parentInfo.id : -1; |
| ks.onUserAdded(userHandle, parentHandle); |
| } else if (Intent.ACTION_USER_STARTING.equals(intent.getAction())) { |
| final int userHandle = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0); |
| mStorage.prefetchUser(userHandle); |
| } else if (Intent.ACTION_USER_REMOVED.equals(intent.getAction())) { |
| final int userHandle = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0); |
| if (userHandle > 0) { |
| removeUser(userHandle, /* unknownUser= */ false); |
| } |
| } |
| } |
| }; |
| |
| @Override // binder interface |
| public void systemReady() { |
| migrateOldData(); |
| try { |
| getGateKeeperService(); |
| } catch (RemoteException e) { |
| Slog.e(TAG, "Failure retrieving IGateKeeperService", e); |
| } |
| // TODO: maybe skip this for split system user mode. |
| mStorage.prefetchUser(UserHandle.USER_SYSTEM); |
| } |
| |
| private void migrateOldData() { |
| try { |
| // These Settings moved before multi-user was enabled, so we only have to do it for the |
| // root user. |
| if (getString("migrated", null, 0) == null) { |
| final ContentResolver cr = mContext.getContentResolver(); |
| for (String validSetting : VALID_SETTINGS) { |
| String value = Settings.Secure.getString(cr, validSetting); |
| if (value != null) { |
| setString(validSetting, value, 0); |
| } |
| } |
| // No need to move the password / pattern files. They're already in the right place. |
| setString("migrated", "true", 0); |
| Slog.i(TAG, "Migrated lock settings to new location"); |
| } |
| |
| // These Settings changed after multi-user was enabled, hence need to be moved per user. |
| if (getString("migrated_user_specific", null, 0) == null) { |
| final ContentResolver cr = mContext.getContentResolver(); |
| List<UserInfo> users = mUserManager.getUsers(); |
| for (int user = 0; user < users.size(); user++) { |
| // Migrate owner info |
| final int userId = users.get(user).id; |
| final String OWNER_INFO = Secure.LOCK_SCREEN_OWNER_INFO; |
| String ownerInfo = Settings.Secure.getStringForUser(cr, OWNER_INFO, userId); |
| if (!TextUtils.isEmpty(ownerInfo)) { |
| setString(OWNER_INFO, ownerInfo, userId); |
| Settings.Secure.putStringForUser(cr, OWNER_INFO, "", userId); |
| } |
| |
| // Migrate owner info enabled. Note there was a bug where older platforms only |
| // stored this value if the checkbox was toggled at least once. The code detects |
| // this case by handling the exception. |
| final String OWNER_INFO_ENABLED = Secure.LOCK_SCREEN_OWNER_INFO_ENABLED; |
| boolean enabled; |
| try { |
| int ivalue = Settings.Secure.getIntForUser(cr, OWNER_INFO_ENABLED, userId); |
| enabled = ivalue != 0; |
| setLong(OWNER_INFO_ENABLED, enabled ? 1 : 0, userId); |
| } catch (SettingNotFoundException e) { |
| // Setting was never stored. Store it if the string is not empty. |
| if (!TextUtils.isEmpty(ownerInfo)) { |
| setLong(OWNER_INFO_ENABLED, 1, userId); |
| } |
| } |
| Settings.Secure.putIntForUser(cr, OWNER_INFO_ENABLED, 0, userId); |
| } |
| // No need to move the password / pattern files. They're already in the right place. |
| setString("migrated_user_specific", "true", 0); |
| Slog.i(TAG, "Migrated per-user lock settings to new location"); |
| } |
| |
| // Migrates biometric weak such that the fallback mechanism becomes the primary. |
| if (getString("migrated_biometric_weak", null, 0) == null) { |
| List<UserInfo> users = mUserManager.getUsers(); |
| for (int i = 0; i < users.size(); i++) { |
| int userId = users.get(i).id; |
| long type = getLong(LockPatternUtils.PASSWORD_TYPE_KEY, |
| DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, |
| userId); |
| long alternateType = getLong(LockPatternUtils.PASSWORD_TYPE_ALTERNATE_KEY, |
| DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, |
| userId); |
| if (type == DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK) { |
| setLong(LockPatternUtils.PASSWORD_TYPE_KEY, |
| alternateType, |
| userId); |
| } |
| setLong(LockPatternUtils.PASSWORD_TYPE_ALTERNATE_KEY, |
| DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, |
| userId); |
| } |
| setString("migrated_biometric_weak", "true", 0); |
| Slog.i(TAG, "Migrated biometric weak to use the fallback instead"); |
| } |
| |
| // Migrates lockscreen.disabled. Prior to M, the flag was ignored when more than one |
| // user was present on the system, so if we're upgrading to M and there is more than one |
| // user we disable the flag to remain consistent. |
| if (getString("migrated_lockscreen_disabled", null, 0) == null) { |
| final List<UserInfo> users = mUserManager.getUsers(); |
| final int userCount = users.size(); |
| int switchableUsers = 0; |
| for (int i = 0; i < userCount; i++) { |
| if (users.get(i).supportsSwitchTo()) { |
| switchableUsers++; |
| } |
| } |
| |
| if (switchableUsers > 1) { |
| for (int i = 0; i < userCount; i++) { |
| int id = users.get(i).id; |
| |
| if (getBoolean(LockPatternUtils.DISABLE_LOCKSCREEN_KEY, false, id)) { |
| setBoolean(LockPatternUtils.DISABLE_LOCKSCREEN_KEY, false, id); |
| } |
| } |
| } |
| |
| setString("migrated_lockscreen_disabled", "true", 0); |
| Slog.i(TAG, "Migrated lockscreen disabled flag"); |
| } |
| |
| final List<UserInfo> users = mUserManager.getUsers(); |
| for (int i = 0; i < users.size(); i++) { |
| final UserInfo userInfo = users.get(i); |
| if (userInfo.isManagedProfile() && mStorage.hasChildProfileLock(userInfo.id)) { |
| // When managed profile has a unified lock, the password quality stored has 2 |
| // possibilities only. |
| // 1). PASSWORD_QUALITY_UNSPECIFIED, which is upgraded from dp2, and we are |
| // going to set it back to PASSWORD_QUALITY_ALPHANUMERIC. |
| // 2). PASSWORD_QUALITY_ALPHANUMERIC, which is the actual password quality for |
| // unified lock. |
| final long quality = getLong(LockPatternUtils.PASSWORD_TYPE_KEY, |
| DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, userInfo.id); |
| if (quality == DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED) { |
| // Only possible when it's upgraded from nyc dp3 |
| Slog.i(TAG, "Migrated tied profile lock type"); |
| setLong(LockPatternUtils.PASSWORD_TYPE_KEY, |
| DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC, userInfo.id); |
| } else if (quality != DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC) { |
| // It should not happen |
| Slog.e(TAG, "Invalid tied profile lock type: " + quality); |
| } |
| } |
| try { |
| final String alias = LockPatternUtils.PROFILE_KEY_NAME_ENCRYPT + userInfo.id; |
| java.security.KeyStore keyStore = |
| java.security.KeyStore.getInstance("AndroidKeyStore"); |
| keyStore.load(null); |
| if (keyStore.containsAlias(alias)) { |
| keyStore.deleteEntry(alias); |
| } |
| } catch (KeyStoreException | NoSuchAlgorithmException | |
| CertificateException | IOException e) { |
| Slog.e(TAG, "Unable to remove tied profile key", e); |
| } |
| } |
| } catch (RemoteException re) { |
| Slog.e(TAG, "Unable to migrate old data", re); |
| } |
| } |
| |
| private final void checkWritePermission(int userId) { |
| mContext.enforceCallingOrSelfPermission(PERMISSION, "LockSettingsWrite"); |
| } |
| |
| private final void checkPasswordReadPermission(int userId) { |
| mContext.enforceCallingOrSelfPermission(PERMISSION, "LockSettingsRead"); |
| } |
| |
| private final void checkReadPermission(String requestedKey, int userId) { |
| final int callingUid = Binder.getCallingUid(); |
| |
| for (int i = 0; i < READ_CONTACTS_PROTECTED_SETTINGS.length; i++) { |
| String key = READ_CONTACTS_PROTECTED_SETTINGS[i]; |
| if (key.equals(requestedKey) && mContext.checkCallingOrSelfPermission(READ_CONTACTS) |
| != PackageManager.PERMISSION_GRANTED) { |
| throw new SecurityException("uid=" + callingUid |
| + " needs permission " + READ_CONTACTS + " to read " |
| + requestedKey + " for user " + userId); |
| } |
| } |
| |
| for (int i = 0; i < READ_PASSWORD_PROTECTED_SETTINGS.length; i++) { |
| String key = READ_PASSWORD_PROTECTED_SETTINGS[i]; |
| if (key.equals(requestedKey) && mContext.checkCallingOrSelfPermission(PERMISSION) |
| != PackageManager.PERMISSION_GRANTED) { |
| throw new SecurityException("uid=" + callingUid |
| + " needs permission " + PERMISSION + " to read " |
| + requestedKey + " for user " + userId); |
| } |
| } |
| } |
| |
| @Override |
| public boolean getSeparateProfileChallengeEnabled(int userId) throws RemoteException { |
| checkReadPermission(SEPARATE_PROFILE_CHALLENGE_KEY, userId); |
| synchronized (mSeparateChallengeLock) { |
| return getBoolean(SEPARATE_PROFILE_CHALLENGE_KEY, false, userId); |
| } |
| } |
| |
| @Override |
| public void setSeparateProfileChallengeEnabled(int userId, boolean enabled, |
| String managedUserPassword) throws RemoteException { |
| checkWritePermission(userId); |
| synchronized (mSeparateChallengeLock) { |
| setBoolean(SEPARATE_PROFILE_CHALLENGE_KEY, enabled, userId); |
| if (enabled) { |
| mStorage.removeChildProfileLock(userId); |
| removeKeystoreProfileKey(userId); |
| } else { |
| tieManagedProfileLockIfNecessary(userId, managedUserPassword); |
| } |
| } |
| } |
| |
| @Override |
| public void setBoolean(String key, boolean value, int userId) throws RemoteException { |
| checkWritePermission(userId); |
| setStringUnchecked(key, userId, value ? "1" : "0"); |
| } |
| |
| @Override |
| public void setLong(String key, long value, int userId) throws RemoteException { |
| checkWritePermission(userId); |
| setStringUnchecked(key, userId, Long.toString(value)); |
| } |
| |
| @Override |
| public void setString(String key, String value, int userId) throws RemoteException { |
| checkWritePermission(userId); |
| setStringUnchecked(key, userId, value); |
| } |
| |
| private void setStringUnchecked(String key, int userId, String value) { |
| mStorage.writeKeyValue(key, value, userId); |
| if (ArrayUtils.contains(SETTINGS_TO_BACKUP, key)) { |
| BackupManager.dataChanged("com.android.providers.settings"); |
| } |
| } |
| |
| @Override |
| public boolean getBoolean(String key, boolean defaultValue, int userId) throws RemoteException { |
| checkReadPermission(key, userId); |
| String value = getStringUnchecked(key, null, userId); |
| return TextUtils.isEmpty(value) ? |
| defaultValue : (value.equals("1") || value.equals("true")); |
| } |
| |
| @Override |
| public long getLong(String key, long defaultValue, int userId) throws RemoteException { |
| checkReadPermission(key, userId); |
| String value = getStringUnchecked(key, null, userId); |
| return TextUtils.isEmpty(value) ? defaultValue : Long.parseLong(value); |
| } |
| |
| @Override |
| public String getString(String key, String defaultValue, int userId) throws RemoteException { |
| checkReadPermission(key, userId); |
| return getStringUnchecked(key, defaultValue, userId); |
| } |
| |
| public String getStringUnchecked(String key, String defaultValue, int userId) { |
| if (Settings.Secure.LOCK_PATTERN_ENABLED.equals(key)) { |
| long ident = Binder.clearCallingIdentity(); |
| try { |
| return mLockPatternUtils.isLockPatternEnabled(userId) ? "1" : "0"; |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| if (LockPatternUtils.LEGACY_LOCK_PATTERN_ENABLED.equals(key)) { |
| key = Settings.Secure.LOCK_PATTERN_ENABLED; |
| } |
| |
| return mStorage.readKeyValue(key, defaultValue, userId); |
| } |
| |
| @Override |
| public boolean havePassword(int userId) throws RemoteException { |
| // Do we need a permissions check here? |
| return mStorage.hasPassword(userId); |
| } |
| |
| @Override |
| public boolean havePattern(int userId) throws RemoteException { |
| // Do we need a permissions check here? |
| return mStorage.hasPattern(userId); |
| } |
| |
| private void setKeystorePassword(String password, int userHandle) { |
| final KeyStore ks = KeyStore.getInstance(); |
| ks.onUserPasswordChanged(userHandle, password); |
| } |
| |
| private void unlockKeystore(String password, int userHandle) { |
| if (DEBUG) Slog.v(TAG, "Unlock keystore for user: " + userHandle); |
| final KeyStore ks = KeyStore.getInstance(); |
| ks.unlock(userHandle, password); |
| } |
| |
| private String getDecryptedPasswordForTiedProfile(int userId) |
| throws KeyStoreException, UnrecoverableKeyException, |
| NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, |
| InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, |
| CertificateException, IOException { |
| if (DEBUG) Slog.v(TAG, "Get child profile decrytped key"); |
| byte[] storedData = mStorage.readChildProfileLock(userId); |
| if (storedData == null) { |
| throw new FileNotFoundException("Child profile lock file not found"); |
| } |
| byte[] iv = Arrays.copyOfRange(storedData, 0, PROFILE_KEY_IV_SIZE); |
| byte[] encryptedPassword = Arrays.copyOfRange(storedData, PROFILE_KEY_IV_SIZE, |
| storedData.length); |
| byte[] decryptionResult; |
| java.security.KeyStore keyStore = java.security.KeyStore.getInstance("AndroidKeyStore"); |
| keyStore.load(null); |
| SecretKey decryptionKey = (SecretKey) keyStore.getKey( |
| LockPatternUtils.PROFILE_KEY_NAME_DECRYPT + userId, null); |
| |
| Cipher cipher = Cipher.getInstance(KeyProperties.KEY_ALGORITHM_AES + "/" |
| + KeyProperties.BLOCK_MODE_GCM + "/" + KeyProperties.ENCRYPTION_PADDING_NONE); |
| |
| cipher.init(Cipher.DECRYPT_MODE, decryptionKey, new GCMParameterSpec(128, iv)); |
| decryptionResult = cipher.doFinal(encryptedPassword); |
| return new String(decryptionResult, StandardCharsets.UTF_8); |
| } |
| |
| private void unlockChildProfile(int profileHandle) throws RemoteException { |
| try { |
| doVerifyPassword(getDecryptedPasswordForTiedProfile(profileHandle), false, |
| 0 /* no challenge */, profileHandle, null /* progressCallback */); |
| } catch (UnrecoverableKeyException | InvalidKeyException | KeyStoreException |
| | NoSuchAlgorithmException | NoSuchPaddingException |
| | InvalidAlgorithmParameterException | IllegalBlockSizeException |
| | BadPaddingException | CertificateException | IOException e) { |
| if (e instanceof FileNotFoundException) { |
| Slog.i(TAG, "Child profile key not found"); |
| } else { |
| Slog.e(TAG, "Failed to decrypt child profile key", e); |
| } |
| } |
| } |
| |
| private void unlockUser(int userId, byte[] token, byte[] secret) { |
| // TODO: make this method fully async so we can update UI with progress strings |
| final CountDownLatch latch = new CountDownLatch(1); |
| final IProgressListener listener = new IProgressListener.Stub() { |
| @Override |
| public void onStarted(int id, Bundle extras) throws RemoteException { |
| Log.d(TAG, "unlockUser started"); |
| } |
| |
| @Override |
| public void onProgress(int id, int progress, Bundle extras) throws RemoteException { |
| Log.d(TAG, "unlockUser progress " + progress); |
| } |
| |
| @Override |
| public void onFinished(int id, Bundle extras) throws RemoteException { |
| Log.d(TAG, "unlockUser finished"); |
| latch.countDown(); |
| } |
| }; |
| |
| try { |
| ActivityManagerNative.getDefault().unlockUser(userId, token, secret, listener); |
| } catch (RemoteException e) { |
| throw e.rethrowAsRuntimeException(); |
| } |
| |
| try { |
| latch.await(15, TimeUnit.SECONDS); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| } |
| try { |
| if (!mUserManager.getUserInfo(userId).isManagedProfile()) { |
| final List<UserInfo> profiles = mUserManager.getProfiles(userId); |
| for (UserInfo pi : profiles) { |
| // Unlock managed profile with unified lock |
| if (pi.isManagedProfile() |
| && !mLockPatternUtils.isSeparateProfileChallengeEnabled(pi.id) |
| && mStorage.hasChildProfileLock(pi.id)) { |
| unlockChildProfile(pi.id); |
| } |
| } |
| } |
| } catch (RemoteException e) { |
| Log.d(TAG, "Failed to unlock child profile", e); |
| } |
| } |
| |
| private byte[] getCurrentHandle(int userId) { |
| CredentialHash credential; |
| byte[] currentHandle; |
| |
| int currentHandleType = mStorage.getStoredCredentialType(userId); |
| switch (currentHandleType) { |
| case CredentialHash.TYPE_PATTERN: |
| credential = mStorage.readPatternHash(userId); |
| currentHandle = credential != null |
| ? credential.hash |
| : null; |
| break; |
| case CredentialHash.TYPE_PASSWORD: |
| credential = mStorage.readPasswordHash(userId); |
| currentHandle = credential != null |
| ? credential.hash |
| : null; |
| break; |
| case CredentialHash.TYPE_NONE: |
| default: |
| currentHandle = null; |
| break; |
| } |
| |
| // sanity check |
| if (currentHandleType != CredentialHash.TYPE_NONE && currentHandle == null) { |
| Slog.e(TAG, "Stored handle type [" + currentHandleType + "] but no handle available"); |
| } |
| |
| return currentHandle; |
| } |
| |
| private void onUserLockChanged(int userId) throws RemoteException { |
| if (mUserManager.getUserInfo(userId).isManagedProfile()) { |
| return; |
| } |
| final boolean isSecure = mStorage.hasPassword(userId) || mStorage.hasPattern(userId); |
| final List<UserInfo> profiles = mUserManager.getProfiles(userId); |
| final int size = profiles.size(); |
| for (int i = 0; i < size; i++) { |
| final UserInfo profile = profiles.get(i); |
| if (profile.isManagedProfile()) { |
| final int managedUserId = profile.id; |
| if (mLockPatternUtils.isSeparateProfileChallengeEnabled(managedUserId)) { |
| continue; |
| } |
| if (isSecure) { |
| tieManagedProfileLockIfNecessary(managedUserId, null); |
| } else { |
| clearUserKeyProtection(managedUserId); |
| getGateKeeperService().clearSecureUserId(managedUserId); |
| mStorage.writePatternHash(null, managedUserId); |
| setKeystorePassword(null, managedUserId); |
| fixateNewestUserKeyAuth(managedUserId); |
| mStorage.removeChildProfileLock(managedUserId); |
| removeKeystoreProfileKey(managedUserId); |
| } |
| } |
| } |
| } |
| |
| private boolean isManagedProfileWithUnifiedLock(int userId) { |
| return mUserManager.getUserInfo(userId).isManagedProfile() |
| && !mLockPatternUtils.isSeparateProfileChallengeEnabled(userId); |
| } |
| |
| private boolean isManagedProfileWithSeparatedLock(int userId) { |
| return mUserManager.getUserInfo(userId).isManagedProfile() |
| && mLockPatternUtils.isSeparateProfileChallengeEnabled(userId); |
| } |
| |
| // This method should be called by LockPatternUtil only, all internal methods in this class |
| // should call setLockPatternInternal. |
| @Override |
| public void setLockPattern(String pattern, String savedCredential, int userId) |
| throws RemoteException { |
| checkWritePermission(userId); |
| synchronized (mSeparateChallengeLock) { |
| setLockPatternInternal(pattern, savedCredential, userId); |
| setSeparateProfileChallengeEnabled(userId, true, null); |
| } |
| } |
| |
| private void setLockPatternInternal(String pattern, String savedCredential, int userId) |
| throws RemoteException { |
| byte[] currentHandle = getCurrentHandle(userId); |
| |
| if (pattern == null) { |
| clearUserKeyProtection(userId); |
| getGateKeeperService().clearSecureUserId(userId); |
| mStorage.writePatternHash(null, userId); |
| setKeystorePassword(null, userId); |
| fixateNewestUserKeyAuth(userId); |
| onUserLockChanged(userId); |
| return; |
| } |
| |
| if (isManagedProfileWithUnifiedLock(userId)) { |
| // get credential from keystore when managed profile has unified lock |
| try { |
| savedCredential = getDecryptedPasswordForTiedProfile(userId); |
| } catch (UnrecoverableKeyException | InvalidKeyException | KeyStoreException |
| | NoSuchAlgorithmException | NoSuchPaddingException |
| | InvalidAlgorithmParameterException | IllegalBlockSizeException |
| | BadPaddingException | CertificateException | IOException e) { |
| if (e instanceof FileNotFoundException) { |
| Slog.i(TAG, "Child profile key not found"); |
| } else { |
| Slog.e(TAG, "Failed to decrypt child profile key", e); |
| } |
| } |
| } else { |
| if (currentHandle == null) { |
| if (savedCredential != null) { |
| Slog.w(TAG, "Saved credential provided, but none stored"); |
| } |
| savedCredential = null; |
| } |
| } |
| |
| byte[] enrolledHandle = enrollCredential(currentHandle, savedCredential, pattern, userId); |
| if (enrolledHandle != null) { |
| CredentialHash willStore |
| = new CredentialHash(enrolledHandle, CredentialHash.VERSION_GATEKEEPER); |
| setUserKeyProtection(userId, pattern, |
| doVerifyPattern(pattern, willStore, true, 0, userId, null /* progressCallback */)); |
| mStorage.writePatternHash(enrolledHandle, userId); |
| fixateNewestUserKeyAuth(userId); |
| onUserLockChanged(userId); |
| } else { |
| throw new RemoteException("Failed to enroll pattern"); |
| } |
| } |
| |
| // This method should be called by LockPatternUtil only, all internal methods in this class |
| // should call setLockPasswordInternal. |
| @Override |
| public void setLockPassword(String password, String savedCredential, int userId) |
| throws RemoteException { |
| checkWritePermission(userId); |
| synchronized (mSeparateChallengeLock) { |
| setLockPasswordInternal(password, savedCredential, userId); |
| setSeparateProfileChallengeEnabled(userId, true, null); |
| } |
| } |
| |
| private void setLockPasswordInternal(String password, String savedCredential, int userId) |
| throws RemoteException { |
| byte[] currentHandle = getCurrentHandle(userId); |
| if (password == null) { |
| clearUserKeyProtection(userId); |
| getGateKeeperService().clearSecureUserId(userId); |
| mStorage.writePasswordHash(null, userId); |
| setKeystorePassword(null, userId); |
| fixateNewestUserKeyAuth(userId); |
| onUserLockChanged(userId); |
| return; |
| } |
| |
| if (isManagedProfileWithUnifiedLock(userId)) { |
| // get credential from keystore when managed profile has unified lock |
| try { |
| savedCredential = getDecryptedPasswordForTiedProfile(userId); |
| } catch (FileNotFoundException e) { |
| Slog.i(TAG, "Child profile key not found"); |
| } catch (UnrecoverableKeyException | InvalidKeyException | KeyStoreException |
| | NoSuchAlgorithmException | NoSuchPaddingException |
| | InvalidAlgorithmParameterException | IllegalBlockSizeException |
| | BadPaddingException | CertificateException | IOException e) { |
| Slog.e(TAG, "Failed to decrypt child profile key", e); |
| } |
| } else { |
| if (currentHandle == null) { |
| if (savedCredential != null) { |
| Slog.w(TAG, "Saved credential provided, but none stored"); |
| } |
| savedCredential = null; |
| } |
| } |
| |
| byte[] enrolledHandle = enrollCredential(currentHandle, savedCredential, password, userId); |
| if (enrolledHandle != null) { |
| CredentialHash willStore |
| = new CredentialHash(enrolledHandle, CredentialHash.VERSION_GATEKEEPER); |
| setUserKeyProtection(userId, password, |
| doVerifyPassword(password, willStore, true, 0, userId, |
| null /* progressCallback */)); |
| mStorage.writePasswordHash(enrolledHandle, userId); |
| fixateNewestUserKeyAuth(userId); |
| onUserLockChanged(userId); |
| } else { |
| throw new RemoteException("Failed to enroll password"); |
| } |
| } |
| |
| private void tieProfileLockToParent(int userId, String password) { |
| if (DEBUG) Slog.v(TAG, "tieProfileLockToParent for user: " + userId); |
| byte[] randomLockSeed = password.getBytes(StandardCharsets.UTF_8); |
| byte[] encryptionResult; |
| byte[] iv; |
| try { |
| KeyGenerator keyGenerator = KeyGenerator.getInstance(KeyProperties.KEY_ALGORITHM_AES); |
| keyGenerator.init(new SecureRandom()); |
| SecretKey secretKey = keyGenerator.generateKey(); |
| java.security.KeyStore keyStore = java.security.KeyStore.getInstance("AndroidKeyStore"); |
| keyStore.load(null); |
| try { |
| keyStore.setEntry( |
| LockPatternUtils.PROFILE_KEY_NAME_ENCRYPT + userId, |
| new java.security.KeyStore.SecretKeyEntry(secretKey), |
| new KeyProtection.Builder(KeyProperties.PURPOSE_ENCRYPT) |
| .setBlockModes(KeyProperties.BLOCK_MODE_GCM) |
| .setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_NONE) |
| .build()); |
| keyStore.setEntry( |
| LockPatternUtils.PROFILE_KEY_NAME_DECRYPT + userId, |
| new java.security.KeyStore.SecretKeyEntry(secretKey), |
| new KeyProtection.Builder(KeyProperties.PURPOSE_DECRYPT) |
| .setBlockModes(KeyProperties.BLOCK_MODE_GCM) |
| .setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_NONE) |
| .setUserAuthenticationRequired(true) |
| .setUserAuthenticationValidityDurationSeconds(30) |
| .build()); |
| // Key imported, obtain a reference to it. |
| SecretKey keyStoreEncryptionKey = (SecretKey) keyStore.getKey( |
| LockPatternUtils.PROFILE_KEY_NAME_ENCRYPT + userId, null); |
| Cipher cipher = Cipher.getInstance( |
| KeyProperties.KEY_ALGORITHM_AES + "/" + KeyProperties.BLOCK_MODE_GCM + "/" |
| + KeyProperties.ENCRYPTION_PADDING_NONE); |
| cipher.init(Cipher.ENCRYPT_MODE, keyStoreEncryptionKey); |
| encryptionResult = cipher.doFinal(randomLockSeed); |
| iv = cipher.getIV(); |
| } finally { |
| // The original key can now be discarded. |
| keyStore.deleteEntry(LockPatternUtils.PROFILE_KEY_NAME_ENCRYPT + userId); |
| } |
| } catch (CertificateException | UnrecoverableKeyException |
| | IOException | BadPaddingException | IllegalBlockSizeException | KeyStoreException |
| | NoSuchPaddingException | NoSuchAlgorithmException | InvalidKeyException e) { |
| throw new RuntimeException("Failed to encrypt key", e); |
| } |
| ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); |
| try { |
| if (iv.length != PROFILE_KEY_IV_SIZE) { |
| throw new RuntimeException("Invalid iv length: " + iv.length); |
| } |
| outputStream.write(iv); |
| outputStream.write(encryptionResult); |
| } catch (IOException e) { |
| throw new RuntimeException("Failed to concatenate byte arrays", e); |
| } |
| mStorage.writeChildProfileLock(userId, outputStream.toByteArray()); |
| } |
| |
| private byte[] enrollCredential(byte[] enrolledHandle, |
| String enrolledCredential, String toEnroll, int userId) |
| throws RemoteException { |
| checkWritePermission(userId); |
| byte[] enrolledCredentialBytes = enrolledCredential == null |
| ? null |
| : enrolledCredential.getBytes(); |
| byte[] toEnrollBytes = toEnroll == null |
| ? null |
| : toEnroll.getBytes(); |
| GateKeeperResponse response = getGateKeeperService().enroll(userId, enrolledHandle, |
| enrolledCredentialBytes, toEnrollBytes); |
| |
| if (response == null) { |
| return null; |
| } |
| |
| byte[] hash = response.getPayload(); |
| if (hash != null) { |
| setKeystorePassword(toEnroll, userId); |
| } else { |
| // Should not happen |
| Slog.e(TAG, "Throttled while enrolling a password"); |
| } |
| return hash; |
| } |
| |
| private void setUserKeyProtection(int userId, String credential, VerifyCredentialResponse vcr) |
| throws RemoteException { |
| if (vcr == null) { |
| throw new RemoteException("Null response verifying a credential we just set"); |
| } |
| if (vcr.getResponseCode() != VerifyCredentialResponse.RESPONSE_OK) { |
| throw new RemoteException("Non-OK response verifying a credential we just set: " |
| + vcr.getResponseCode()); |
| } |
| byte[] token = vcr.getPayload(); |
| if (token == null) { |
| throw new RemoteException("Empty payload verifying a credential we just set"); |
| } |
| addUserKeyAuth(userId, token, secretFromCredential(credential)); |
| } |
| |
| private void clearUserKeyProtection(int userId) throws RemoteException { |
| addUserKeyAuth(userId, null, null); |
| } |
| |
| private static byte[] secretFromCredential(String credential) throws RemoteException { |
| try { |
| MessageDigest digest = MessageDigest.getInstance("SHA-512"); |
| // Personalize the hash |
| byte[] personalization = "Android FBE credential hash" |
| .getBytes(StandardCharsets.UTF_8); |
| // Pad it to the block size of the hash function |
| personalization = Arrays.copyOf(personalization, 128); |
| digest.update(personalization); |
| digest.update(credential.getBytes(StandardCharsets.UTF_8)); |
| return digest.digest(); |
| } catch (NoSuchAlgorithmException e) { |
| throw new RuntimeException("NoSuchAlgorithmException for SHA-512"); |
| } |
| } |
| |
| private void addUserKeyAuth(int userId, byte[] token, byte[] secret) |
| throws RemoteException { |
| final UserInfo userInfo = UserManager.get(mContext).getUserInfo(userId); |
| final IMountService mountService = getMountService(); |
| final long callingId = Binder.clearCallingIdentity(); |
| try { |
| mountService.addUserKeyAuth(userId, userInfo.serialNumber, token, secret); |
| } finally { |
| Binder.restoreCallingIdentity(callingId); |
| } |
| } |
| |
| private void fixateNewestUserKeyAuth(int userId) |
| throws RemoteException { |
| final IMountService mountService = getMountService(); |
| final long callingId = Binder.clearCallingIdentity(); |
| try { |
| mountService.fixateNewestUserKeyAuth(userId); |
| } finally { |
| Binder.restoreCallingIdentity(callingId); |
| } |
| } |
| |
| @Override |
| public void resetKeyStore(int userId) throws RemoteException { |
| checkWritePermission(userId); |
| if (DEBUG) Slog.v(TAG, "Reset keystore for user: " + userId); |
| int managedUserId = -1; |
| String managedUserDecryptedPassword = null; |
| final List<UserInfo> profiles = mUserManager.getProfiles(userId); |
| for (UserInfo pi : profiles) { |
| // Unlock managed profile with unified lock |
| if (pi.isManagedProfile() |
| && !mLockPatternUtils.isSeparateProfileChallengeEnabled(pi.id) |
| && mStorage.hasChildProfileLock(pi.id)) { |
| try { |
| if (managedUserId == -1) { |
| managedUserDecryptedPassword = getDecryptedPasswordForTiedProfile(pi.id); |
| managedUserId = pi.id; |
| } else { |
| // Should not happen |
| Slog.e(TAG, "More than one managed profile, uid1:" + managedUserId |
| + ", uid2:" + pi.id); |
| } |
| } catch (UnrecoverableKeyException | InvalidKeyException | KeyStoreException |
| | NoSuchAlgorithmException | NoSuchPaddingException |
| | InvalidAlgorithmParameterException | IllegalBlockSizeException |
| | BadPaddingException | CertificateException | IOException e) { |
| Slog.e(TAG, "Failed to decrypt child profile key", e); |
| } |
| } |
| } |
| try { |
| // Clear all the users credentials could have been installed in for this user. |
| for (int profileId : mUserManager.getProfileIdsWithDisabled(userId)) { |
| for (int uid : SYSTEM_CREDENTIAL_UIDS) { |
| mKeyStore.clearUid(UserHandle.getUid(profileId, uid)); |
| } |
| } |
| } finally { |
| if (managedUserId != -1 && managedUserDecryptedPassword != null) { |
| if (DEBUG) Slog.v(TAG, "Restore tied profile lock"); |
| tieProfileLockToParent(managedUserId, managedUserDecryptedPassword); |
| } |
| } |
| } |
| |
| @Override |
| public VerifyCredentialResponse checkPattern(String pattern, int userId, |
| ICheckCredentialProgressCallback progressCallback) throws RemoteException { |
| return doVerifyPattern(pattern, false, 0, userId, progressCallback); |
| } |
| |
| @Override |
| public VerifyCredentialResponse verifyPattern(String pattern, long challenge, int userId) |
| throws RemoteException { |
| return doVerifyPattern(pattern, true, challenge, userId, null /* progressCallback */); |
| } |
| |
| private VerifyCredentialResponse doVerifyPattern(String pattern, boolean hasChallenge, |
| long challenge, int userId, ICheckCredentialProgressCallback progressCallback) |
| throws RemoteException { |
| checkPasswordReadPermission(userId); |
| CredentialHash storedHash = mStorage.readPatternHash(userId); |
| return doVerifyPattern(pattern, storedHash, hasChallenge, challenge, userId, |
| progressCallback); |
| } |
| |
| private VerifyCredentialResponse doVerifyPattern(String pattern, CredentialHash storedHash, |
| boolean hasChallenge, long challenge, int userId, |
| ICheckCredentialProgressCallback progressCallback) throws RemoteException { |
| boolean shouldReEnrollBaseZero = storedHash != null && storedHash.isBaseZeroPattern; |
| |
| String patternToVerify; |
| if (shouldReEnrollBaseZero) { |
| patternToVerify = LockPatternUtils.patternStringToBaseZero(pattern); |
| } else { |
| patternToVerify = pattern; |
| } |
| |
| VerifyCredentialResponse response = verifyCredential(userId, storedHash, patternToVerify, |
| hasChallenge, challenge, |
| new CredentialUtil() { |
| @Override |
| public void setCredential(String pattern, String oldPattern, int userId) |
| throws RemoteException { |
| setLockPatternInternal(pattern, oldPattern, userId); |
| } |
| |
| @Override |
| public byte[] toHash(String pattern, int userId) { |
| return LockPatternUtils.patternToHash( |
| LockPatternUtils.stringToPattern(pattern)); |
| } |
| |
| @Override |
| public String adjustForKeystore(String pattern) { |
| return LockPatternUtils.patternStringToBaseZero(pattern); |
| } |
| }, |
| progressCallback |
| ); |
| |
| if (response.getResponseCode() == VerifyCredentialResponse.RESPONSE_OK |
| && shouldReEnrollBaseZero) { |
| setLockPatternInternal(pattern, patternToVerify, userId); |
| } |
| |
| return response; |
| } |
| |
| @Override |
| public VerifyCredentialResponse checkPassword(String password, int userId, |
| ICheckCredentialProgressCallback progressCallback) throws RemoteException { |
| return doVerifyPassword(password, false, 0, userId, progressCallback); |
| } |
| |
| @Override |
| public VerifyCredentialResponse verifyPassword(String password, long challenge, int userId) |
| throws RemoteException { |
| return doVerifyPassword(password, true, challenge, userId, null /* progressCallback */); |
| } |
| |
| @Override |
| public VerifyCredentialResponse verifyTiedProfileChallenge(String password, boolean isPattern, |
| long challenge, int userId) throws RemoteException { |
| checkPasswordReadPermission(userId); |
| if (!isManagedProfileWithUnifiedLock(userId)) { |
| throw new RemoteException("User id must be managed profile with unified lock"); |
| } |
| final int parentProfileId = mUserManager.getProfileParent(userId).id; |
| // Unlock parent by using parent's challenge |
| final VerifyCredentialResponse parentResponse = isPattern |
| ? doVerifyPattern(password, true, challenge, parentProfileId, |
| null /* progressCallback */) |
| : doVerifyPassword(password, true, challenge, parentProfileId, |
| null /* progressCallback */); |
| if (parentResponse.getResponseCode() != VerifyCredentialResponse.RESPONSE_OK) { |
| // Failed, just return parent's response |
| return parentResponse; |
| } |
| |
| try { |
| // Unlock work profile, and work profile with unified lock must use password only |
| return doVerifyPassword(getDecryptedPasswordForTiedProfile(userId), true, |
| challenge, |
| userId, null /* progressCallback */); |
| } catch (UnrecoverableKeyException | InvalidKeyException | KeyStoreException |
| | NoSuchAlgorithmException | NoSuchPaddingException |
| | InvalidAlgorithmParameterException | IllegalBlockSizeException |
| | BadPaddingException | CertificateException | IOException e) { |
| Slog.e(TAG, "Failed to decrypt child profile key", e); |
| throw new RemoteException("Unable to get tied profile token"); |
| } |
| } |
| |
| private VerifyCredentialResponse doVerifyPassword(String password, boolean hasChallenge, |
| long challenge, int userId, ICheckCredentialProgressCallback progressCallback) |
| throws RemoteException { |
| checkPasswordReadPermission(userId); |
| CredentialHash storedHash = mStorage.readPasswordHash(userId); |
| return doVerifyPassword(password, storedHash, hasChallenge, challenge, userId, |
| progressCallback); |
| } |
| |
| private VerifyCredentialResponse doVerifyPassword(String password, CredentialHash storedHash, |
| boolean hasChallenge, long challenge, int userId, |
| ICheckCredentialProgressCallback progressCallback) throws RemoteException { |
| return verifyCredential(userId, storedHash, password, hasChallenge, challenge, |
| new CredentialUtil() { |
| @Override |
| public void setCredential(String password, String oldPassword, int userId) |
| throws RemoteException { |
| setLockPasswordInternal(password, oldPassword, userId); |
| } |
| |
| @Override |
| public byte[] toHash(String password, int userId) { |
| return mLockPatternUtils.passwordToHash(password, userId); |
| } |
| |
| @Override |
| public String adjustForKeystore(String password) { |
| return password; |
| } |
| }, progressCallback); |
| } |
| |
| private VerifyCredentialResponse verifyCredential(int userId, CredentialHash storedHash, |
| String credential, boolean hasChallenge, long challenge, CredentialUtil credentialUtil, |
| ICheckCredentialProgressCallback progressCallback) |
| throws RemoteException { |
| if ((storedHash == null || storedHash.hash.length == 0) && TextUtils.isEmpty(credential)) { |
| // don't need to pass empty credentials to GateKeeper |
| return VerifyCredentialResponse.OK; |
| } |
| |
| if (TextUtils.isEmpty(credential)) { |
| return VerifyCredentialResponse.ERROR; |
| } |
| |
| if (storedHash.version == CredentialHash.VERSION_LEGACY) { |
| byte[] hash = credentialUtil.toHash(credential, userId); |
| if (Arrays.equals(hash, storedHash.hash)) { |
| unlockKeystore(credentialUtil.adjustForKeystore(credential), userId); |
| |
| // Users with legacy credentials don't have credential-backed |
| // FBE keys, so just pass through a fake token/secret |
| Slog.i(TAG, "Unlocking user with fake token: " + userId); |
| final byte[] fakeToken = String.valueOf(userId).getBytes(); |
| unlockUser(userId, fakeToken, fakeToken); |
| |
| // migrate credential to GateKeeper |
| credentialUtil.setCredential(credential, null, userId); |
| if (!hasChallenge) { |
| return VerifyCredentialResponse.OK; |
| } |
| // Fall through to get the auth token. Technically this should never happen, |
| // as a user that had a legacy credential would have to unlock their device |
| // before getting to a flow with a challenge, but supporting for consistency. |
| } else { |
| return VerifyCredentialResponse.ERROR; |
| } |
| } |
| |
| VerifyCredentialResponse response; |
| boolean shouldReEnroll = false; |
| GateKeeperResponse gateKeeperResponse = getGateKeeperService() |
| .verifyChallenge(userId, challenge, storedHash.hash, credential.getBytes()); |
| int responseCode = gateKeeperResponse.getResponseCode(); |
| if (responseCode == GateKeeperResponse.RESPONSE_RETRY) { |
| response = new VerifyCredentialResponse(gateKeeperResponse.getTimeout()); |
| } else if (responseCode == GateKeeperResponse.RESPONSE_OK) { |
| byte[] token = gateKeeperResponse.getPayload(); |
| if (token == null) { |
| // something's wrong if there's no payload with a challenge |
| Slog.e(TAG, "verifyChallenge response had no associated payload"); |
| response = VerifyCredentialResponse.ERROR; |
| } else { |
| shouldReEnroll = gateKeeperResponse.getShouldReEnroll(); |
| response = new VerifyCredentialResponse(token); |
| } |
| } else { |
| response = VerifyCredentialResponse.ERROR; |
| } |
| |
| if (response.getResponseCode() == VerifyCredentialResponse.RESPONSE_OK) { |
| |
| |
| // credential has matched |
| |
| if (progressCallback != null) { |
| progressCallback.onCredentialVerified(); |
| } |
| unlockKeystore(credential, userId); |
| |
| Slog.i(TAG, "Unlocking user " + userId + |
| " with token length " + response.getPayload().length); |
| unlockUser(userId, response.getPayload(), secretFromCredential(credential)); |
| |
| if (isManagedProfileWithSeparatedLock(userId)) { |
| TrustManager trustManager = |
| (TrustManager) mContext.getSystemService(Context.TRUST_SERVICE); |
| trustManager.setDeviceLockedForUser(userId, false); |
| } |
| if (shouldReEnroll) { |
| credentialUtil.setCredential(credential, credential, userId); |
| } |
| } else if (response.getResponseCode() == VerifyCredentialResponse.RESPONSE_RETRY) { |
| if (response.getTimeout() > 0) { |
| requireStrongAuth(STRONG_AUTH_REQUIRED_AFTER_LOCKOUT, userId); |
| } |
| } |
| |
| return response; |
| } |
| |
| @Override |
| public boolean checkVoldPassword(int userId) throws RemoteException { |
| if (!mFirstCallToVold) { |
| return false; |
| } |
| mFirstCallToVold = false; |
| |
| checkPasswordReadPermission(userId); |
| |
| // There's no guarantee that this will safely connect, but if it fails |
| // we will simply show the lock screen when we shouldn't, so relatively |
| // benign. There is an outside chance something nasty would happen if |
| // this service restarted before vold stales out the password in this |
| // case. The nastiness is limited to not showing the lock screen when |
| // we should, within the first minute of decrypting the phone if this |
| // service can't connect to vold, it restarts, and then the new instance |
| // does successfully connect. |
| final IMountService service = getMountService(); |
| String password; |
| long identity = Binder.clearCallingIdentity(); |
| try { |
| password = service.getPassword(); |
| service.clearPassword(); |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| if (password == null) { |
| return false; |
| } |
| |
| try { |
| if (mLockPatternUtils.isLockPatternEnabled(userId)) { |
| if (checkPattern(password, userId, null /* progressCallback */).getResponseCode() |
| == GateKeeperResponse.RESPONSE_OK) { |
| return true; |
| } |
| } |
| } catch (Exception e) { |
| } |
| |
| try { |
| if (mLockPatternUtils.isLockPasswordEnabled(userId)) { |
| if (checkPassword(password, userId, null /* progressCallback */).getResponseCode() |
| == GateKeeperResponse.RESPONSE_OK) { |
| return true; |
| } |
| } |
| } catch (Exception e) { |
| } |
| |
| return false; |
| } |
| |
| private void removeUser(int userId, boolean unknownUser) { |
| mStorage.removeUser(userId); |
| mStrongAuth.removeUser(userId); |
| |
| final KeyStore ks = KeyStore.getInstance(); |
| ks.onUserRemoved(userId); |
| |
| try { |
| final IGateKeeperService gk = getGateKeeperService(); |
| if (gk != null) { |
| gk.clearSecureUserId(userId); |
| } |
| } catch (RemoteException ex) { |
| Slog.w(TAG, "unable to clear GK secure user id"); |
| } |
| if (unknownUser || mUserManager.getUserInfo(userId).isManagedProfile()) { |
| removeKeystoreProfileKey(userId); |
| } |
| } |
| |
| private void removeKeystoreProfileKey(int targetUserId) { |
| if (DEBUG) Slog.v(TAG, "Remove keystore profile key for user: " + targetUserId); |
| try { |
| java.security.KeyStore keyStore = java.security.KeyStore.getInstance("AndroidKeyStore"); |
| keyStore.load(null); |
| keyStore.deleteEntry(LockPatternUtils.PROFILE_KEY_NAME_ENCRYPT + targetUserId); |
| keyStore.deleteEntry(LockPatternUtils.PROFILE_KEY_NAME_DECRYPT + targetUserId); |
| } catch (KeyStoreException | NoSuchAlgorithmException | CertificateException |
| | IOException e) { |
| // We have tried our best to remove all keys |
| Slog.e(TAG, "Unable to remove keystore profile key for user:" + targetUserId, e); |
| } |
| } |
| |
| @Override |
| public void registerStrongAuthTracker(IStrongAuthTracker tracker) { |
| checkPasswordReadPermission(UserHandle.USER_ALL); |
| mStrongAuth.registerStrongAuthTracker(tracker); |
| } |
| |
| @Override |
| public void unregisterStrongAuthTracker(IStrongAuthTracker tracker) { |
| checkPasswordReadPermission(UserHandle.USER_ALL); |
| mStrongAuth.unregisterStrongAuthTracker(tracker); |
| } |
| |
| @Override |
| public void requireStrongAuth(int strongAuthReason, int userId) { |
| checkWritePermission(userId); |
| mStrongAuth.requireStrongAuth(strongAuthReason, userId); |
| } |
| |
| @Override |
| public void userPresent(int userId) { |
| checkWritePermission(userId); |
| mStrongAuth.reportUnlock(userId); |
| } |
| |
| @Override |
| public int getStrongAuthForUser(int userId) { |
| checkPasswordReadPermission(userId); |
| return mStrongAuthTracker.getStrongAuthForUser(userId); |
| } |
| |
| private static final String[] VALID_SETTINGS = new String[] { |
| LockPatternUtils.LOCKOUT_PERMANENT_KEY, |
| LockPatternUtils.LOCKOUT_ATTEMPT_DEADLINE, |
| LockPatternUtils.PATTERN_EVER_CHOSEN_KEY, |
| LockPatternUtils.PASSWORD_TYPE_KEY, |
| LockPatternUtils.PASSWORD_TYPE_ALTERNATE_KEY, |
| LockPatternUtils.LOCK_PASSWORD_SALT_KEY, |
| LockPatternUtils.DISABLE_LOCKSCREEN_KEY, |
| LockPatternUtils.LOCKSCREEN_OPTIONS, |
| LockPatternUtils.LOCKSCREEN_BIOMETRIC_WEAK_FALLBACK, |
| LockPatternUtils.BIOMETRIC_WEAK_EVER_CHOSEN_KEY, |
| LockPatternUtils.LOCKSCREEN_POWER_BUTTON_INSTANTLY_LOCKS, |
| LockPatternUtils.PASSWORD_HISTORY_KEY, |
| Secure.LOCK_PATTERN_ENABLED, |
| Secure.LOCK_BIOMETRIC_WEAK_FLAGS, |
| Secure.LOCK_PATTERN_VISIBLE, |
| Secure.LOCK_PATTERN_TACTILE_FEEDBACK_ENABLED |
| }; |
| |
| // Reading these settings needs the contacts permission |
| private static final String[] READ_CONTACTS_PROTECTED_SETTINGS = new String[] { |
| Secure.LOCK_SCREEN_OWNER_INFO_ENABLED, |
| Secure.LOCK_SCREEN_OWNER_INFO |
| }; |
| |
| // Reading these settings needs the same permission as checking the password |
| private static final String[] READ_PASSWORD_PROTECTED_SETTINGS = new String[] { |
| LockPatternUtils.LOCK_PASSWORD_SALT_KEY, |
| LockPatternUtils.PASSWORD_HISTORY_KEY, |
| LockPatternUtils.PASSWORD_TYPE_KEY, |
| SEPARATE_PROFILE_CHALLENGE_KEY |
| }; |
| |
| private static final String[] SETTINGS_TO_BACKUP = new String[] { |
| Secure.LOCK_SCREEN_OWNER_INFO_ENABLED, |
| Secure.LOCK_SCREEN_OWNER_INFO |
| }; |
| |
| private IMountService getMountService() { |
| final IBinder service = ServiceManager.getService("mount"); |
| if (service != null) { |
| return IMountService.Stub.asInterface(service); |
| } |
| return null; |
| } |
| |
| private class GateKeeperDiedRecipient implements IBinder.DeathRecipient { |
| @Override |
| public void binderDied() { |
| mGateKeeperService.asBinder().unlinkToDeath(this, 0); |
| mGateKeeperService = null; |
| } |
| } |
| |
| private synchronized IGateKeeperService getGateKeeperService() |
| throws RemoteException { |
| if (mGateKeeperService != null) { |
| return mGateKeeperService; |
| } |
| |
| final IBinder service = |
| ServiceManager.getService(Context.GATEKEEPER_SERVICE); |
| if (service != null) { |
| service.linkToDeath(new GateKeeperDiedRecipient(), 0); |
| mGateKeeperService = IGateKeeperService.Stub.asInterface(service); |
| return mGateKeeperService; |
| } |
| |
| Slog.e(TAG, "Unable to acquire GateKeeperService"); |
| return null; |
| } |
| } |
